Davicom DM9102

["Richmond, Raymond" <raymond.richmond@ualberta.ca>]

	I posted earlier regarding the dc driver for a Davicom DM9102
ethernet chipset and some problems with the "Watchdog Timer Expired"
message.  Referencing the driver man page the message it mentions that
interrupt delivery on packet transmission might not be happening.  This
problem occurs more frequently in 100Meg mode, but it does happen when
running at 10/half.

	When the error starts showing up, the network is unusable and it
usually takes a few minuted for things to return to some semblance of
normal.

	My question is, should I look at playing with bios settings (it's a
built-in ethernet and used to have IRQ 3 but after disabling USB/LPR and
other unused onboard functions it now uses IRQ 7.)  How can I determine if
it's settings, driver problem, or bad chips?  I have tried different
ethernet cables, plugging it into different switches/hubs so I'm pretty sure
a bad cable has been eliminated.


Relevant dmesg info attached.

Jul 20 11:04:04 contact /bsd: OpenBSD 2.9-current (GENERIC) #0: Thu Jul 19
21:32:09 MDT 2001
Jul 20 11:04:04 contact /bsd:
root@contact:/usr/src/sys/arch/i386/compile/GENERIC
Jul 20 11:04:04 contact /bsd: cpu0: Intel Celeron (Mendocino)
("GenuineIntel" 686-class, 128KB L2 cache) 501 MHz
Jul 20 11:04:04 contact /bsd: cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SYS,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR
Jul 20 11:04:04 contact /bsd: real mem  = 132755456 (129644K)
Jul 20 11:04:04 contact /bsd: avail mem = 118226944 (115456K)
Jul 20 11:04:04 contact /bsd: using 1646 buffers containing 6742016 bytes
(6584K) of memory
Jul 20 11:04:04 contact /bsd: mainbus0 (root)
Jul 20 11:04:04 contact /bsd: bios0 at mainbus0: AT/286+(24) BIOS, date
03/02/00, BIOS32 rev. 0 @ 0xfb140
Jul 20 11:04:04 contact /bsd: apm0 at bios0: Power Management spec V1.2
Jul 20 11:04:04 contact /bsd: apm0: AC on, battery charge unknown
Jul 20 11:04:04 contact /bsd: pcibios0 at bios0: rev. 2.1 @ 0xf0000/0xb5c0
Jul 20 11:04:04 contact /bsd: pcibios0: PCI IRQ Routing Table rev. 1.0 @
0xfdf30/96 (4 entries)
Jul 20 11:04:04 contact /bsd: pcibios0: PCI Exclusive IRQs: 7 10 11 12
Jul 20 11:04:04 contact /bsd: pcibios0: PCI Interrupt Router at 000:31:0
("Intel 82371SB PCI-ISA" rev 0x00)
Jul 20 11:04:04 contact /bsd: pcibios0: PCI bus #1 is the last bus
Jul 20 11:04:04 contact /bsd: bios0: ROM list: 0xc0000/0x8000 0xc8000/0x4000
Jul 20 11:04:04 contact /bsd: pci0 at mainbus0 bus 0: configuration mode 1
(no bios)
Jul 20 11:04:04 contact /bsd: pchb0 at pci0 dev 0 function 0 "Intel 82810"
rev 0x02: rng active, 8Kb/sec
Jul 20 11:04:04 contact /bsd: vga1 at pci0 dev 1 function 0 "Intel 82810
Graphics" rev 0x02
Jul 20 11:04:04 contact /bsd: wsdisplay0 at vga1: console (80x25, vt100
emulation)
Jul 20 11:04:04 contact /bsd: wsdisplay0: screen 1-5 added (80x25, vt100
emulation)
Jul 20 11:04:04 contact /bsd: ppb0 at pci0 dev 30 function 0 "Intel 82801AB
Hub-to-PCI" rev 0x01
Jul 20 11:04:04 contact /bsd: pci1 at ppb0 bus 1
Jul 20 11:04:04 contact /bsd: dc0 at pci1 dev 4 function 0 "Davicom
Technologies DM9102" rev 0x10: irq 7 address 00:d0:09:22:03:da
Jul 20 11:04:04 contact /bsd: amphy0 at dc0 phy 1: Am79C873 10/100 media
interface, rev. 0
Jul 20 11:04:04 contact /bsd: pcib0 at pci0 dev 31 function 0 "Intel 82801AB
LPC" rev 0x01
Jul 20 11:04:04 contact /bsd: pciide0 at pci0 dev 31 function 1 "Intel
82801AB IDE" rev 0x01: DMA, channel 0 wired to compatibility, channel 1
wired to compatibility
Jul 20 11:04:04 contact /bsd: wd0 at pciide0 channel 0 drive 0: <FUJITSU
MPF3102AT>
Jul 20 11:04:04 contact /bsd: wd0: 16-sector PIO, LBA, 9773MB, 16383 cyl, 16
head, 63 sec, 20015856 sectors
Jul 20 11:04:05 contact /bsd: wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA
mode 2
Jul 20 11:04:05 contact /bsd: pciide0: channel 1 ignored (disabled)
Jul 20 11:04:05 contact /bsd: isa0 at pcib0
Jul 20 11:04:05 contact /bsd: isadma0 at isa0
Jul 20 11:04:05 contact /bsd: pckbc0 at isa0 port 0x60/5
Jul 20 11:04:05 contact /bsd: pckbd0 at pckbc0 (kbd slot)
Jul 20 11:04:05 contact /bsd: pckbc0: using irq 1 for kbd slot
Jul 20 11:04:05 contact /bsd: wskbd0 at pckbd0: console keyboard, using
wsdisplay0
Jul 20 11:04:05 contact /bsd: pcppi0 at isa0 port 0x61
Jul 20 11:04:05 contact /bsd: midi0 at pcppi0: <PC speaker>
Jul 20 11:04:05 contact /bsd: sysbeep0 at pcppi0
Jul 20 11:04:05 contact /bsd: npx0 at isa0 port 0xf0/16: using exception 16
Jul 20 11:04:05 contact /bsd: fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
Jul 20 11:04:05 contact /bsd: fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18
sec
Jul 20 11:04:05 contact /bsd: biomask 4040 netmask 40c0 ttymask 40c2
Jul 20 11:04:05 contact /bsd: pctr: 686-class user-level performance
counters enabled
Jul 20 11:04:05 contact /bsd: mtrr: Pentium Pro MTRR support
Jul 20 11:04:05 contact /bsd: dkcsum: wd0 matched BIOS disk 80
Jul 20 11:04:05 contact /bsd: root on wd0a
Jul 20 11:04:05 contact /bsd: rootdev=0x0 rrootdev=0x300 rawdev=0x302
Jul 20 11:04:04 contact savecore: no core dump
Jul 20 13:00:01 contact syslogd: restart
Jul 20 17:00:01 contact syslogd: restart
Jul 20 21:20:39 contact /bsd: dc0: watchdog timeout
Jul 20 21:25:15 contact /bsd: dc0: watchdog timeout
Jul 20 21:34:00 contact /bsd: dc0: watchdog timeout
Jul 20 23:19:48 contact /bsd: dc0: watchdog timeout
Jul 20 23:43:08 contact /bsd: dc0: watchdog timeout